Monthly Archives: June 2020

Update on Foliar Diseases of Soybean

As the rains fall, environmental conditions become favorable for leaf diseases of soybean.  Currently, there are a couple of foliar diseases of soybean that can be observed in fields in Kentucky, which are Septoria brown spot and Phyllosticta leaf spot.

Posted in Grains

Watch for Blister Beetles in Hay

Several species of blister beetles are common in Kentucky; they can be a problem to livestock when they infest alfalfa hay. As few as 5 to 10 of these beetles can be fatal to horses when ingested because of the

Posted in Forages

Hanging by a Thread

Dead, curled leaves dangling by fungal “threads” are typical of a disease called thread blight.  This disease is more common in eastern Kentucky, where it has been observed on apple, cherry, and viburnum.  Other potential hosts include cotoneaster, dogwood, gooseberry,

Posted in Fruit, Landscape Trees & Shrubs

How NOT to Submit Plant Samples for Diagnosis

Spring brings with it fresh, new plant growth and gardeners filled with enthusiasm. However, when landscape or garden plants begin to show symptoms of a problem, or when commercial crops start to decline, the two questions from home gardeners’ and

Posted in Plant Disease Diagnostic Lab

Cleaning and Disinfecting Home Garden Tools and Equipment (PPFS-GEN-17)

Dirty tools, containers, and work surfaces come as no surprise to home gardeners. Rinsing with water to remove obvious soil or plant residues is a common practice. However, this type of basic cleaning can fail to remove microscopic plant pathogens

Posted in Featured Pubs & Videos

Plant Disease Diagnostic Lab Highlights

The following plant disease highlights have been compiled from samples submitted to the University of Kentucky Plant Disease Diagnostic Laboratories from June 1 to June 30, 2020. Diagnostic samples of agronomic crops have included Rhizoctonia damping off, Lepto leaf spot,

Posted in Plant Disease Diagnostic Lab

2020 Insect Trap Counts

Trap counts for major insect pests are provided by the Kentucky IPM Program. Traps are located at the UK Research and Education Center in western Kentucky and the UK Spindletop Farm in Lexington.  Below are trap counts for the current

Posted in Insect Trap Counts

Vegetable Diseases to Scout for: Anthracnose of Cucurbits

With cucurbit crop canopies beginning to close within planting beds, cucumber, cantaloupe, and watermelon growers in Kentucky should be scouting for anthracnose in their plantings. Prevention, early identification, and management will help reduce plant losses. Cause & Disease Development Anthracnose

Posted in Vegetables

Damage by Corn Flea Beetles in Seedling

Problem An absence of rains for almost 2 weeks in western Kentucky allowed the increase in populations of some secondary pests in field corn. One of these insects is the corn flea beetle. Commercial and experimental corn fields have been

Posted in Grains

As Rains Stopped, Thrips Started to Move into Late-Planted Corn

Problem During the second week of June 2020, I noticed some soybean fields with thrips feeding.Soybeans usually are not heavily impacted by thrips and plants recover. Later that week, the Plant Disease Diagnostic Laboratory at the University of Kentucky’s Research

Posted in Grains

Cherry Leaf Spot

Cherry leaf spot is a fungal disease of sweet, sour, and ornamental cherries. While this leaf disease is rarely a death sentence for trees, it can result in reduced blossoms, weakened trees, and increased risk for winter injury. Cherry Leaf

Posted in Fruit, Landscape Trees & Shrubs

Bramble Scout Website

The publication An IPM Scouting Guide for Common Problems of Brambles in Kentucky was first introduced in 2018 as an online/paper version. In order to improve access to this important scouting guide, a mobile website was developed. The Bramble Scout website

Posted in Fruit

Dieback in Landscape Trees – Could it be Verticillium Wilt?

The stress of hot, dry conditions in midsummer can prompt leaf scorch in many landscape trees. However, extensive canopy dieback or tree collapse, particularly on one side of a tree, may indicate Verticillium wilt disease.  Numerous cases of this vascular

Posted in Landscape Trees & Shrubs

Gnats in My Garden!

Individually, midges and gnats would hardly be noticed in the garden, but when they form large clouds or swarms, that attracts attention. As many of these species look like mosquitoes, this also increases concerns of gardeners. Midges and gnats are

Posted in Human Pests

Considerations for Diagnosis of Ornamentals in the Landscape (PPFS-GEN-15)

Diagnosing landscape plant problems can be challenging. However, an assessment of the entire growing site may aid in the diagnostic process. This publication was designed to provide a starting point for determining possible causes behind various plant problems.  The step-by-step

Posted in Featured Pubs & Videos